Improvements with regex system.

include/vase/search.h

@@ -4,20 +4,18 @@
 #include "vase/shard.h"
 
 struct RegexGroup {
-  uint32_t start;
-  uint32_t end;
-  bool matched;
+  uint32_t start{UINT32_MAX};
+  uint32_t end{UINT32_MAX};
 };
 
 struct RegexMatch {
   uint32_t start;
   uint32_t end;
-  std::vector<RegexGroup> groups{};
+  RegexGroup groups[9]{};
 };
 
-const std::vector<RegexMatch> regex_search(
+std::vector<RegexMatch> regex_search(
   Shard *root, std::string_view pattern_str,
   uint32_t start_offset, uint32_t end_offset,
   std::string_view options
 );
-void print_regex(const std::vector<RegexMatch> &matches);

include/vase/shard.h

@@ -4,20 +4,20 @@
 #include "pch.h"
 
 struct Shard {
-  enum struct ShardKind {
+  enum struct ShardKind : uint8_t {
     Branch,
     Petal
   } kind;
 
+  uint8_t height;
+
   uint32_t length;
   uint32_t lines;
 
-  uint8_t height;
-
   std::atomic_uint32_t refs;
 
   Shard(ShardKind kind, uint32_t length, uint32_t lines, uint8_t height)
-      : kind(kind), length(length), lines(lines), height(height), refs(1) {};
+      : kind(kind), height(height), length(length), lines(lines), refs(1) {};
 
   virtual ~Shard() = default;